Perhaps you should try some spelling variations:
de literatura » de litterature, la literatura, y literatura
da literatura » la literatura, a literatura, na literatura
scale studie » scale studies, scale studien, scale study
de filosofia » e filosofia, di filosofia, la filosofia
best scale » bast scale, rest scale, burst scale
studie de » studie der, studie die, studie des

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: best scale studie de filosofia ((da literatura) OR (de literatura))*.